41 
ostrich, or the webbed paddle of the duck: such the 
powerful claw of the crocodile compared with the 
soft, round-tipped paws of the stellio inunguis, the 
salamander, and the frog‘: such the pointed, thoracic 
fins of the scorpeena and perch, to the soft, round, 
and short paddles of the sole and lampern: such the 
powerful claws of the lobster and scorpion to the 
weak feet of the shrimp, and the foliaceous feet of 
the order xyphosura, genus limulus, the monoculus 
pelyphemus, and to the ovate hinder feet of cancer 
depurator; also of the cancer latipes and velutinus 
of Pennant; also cancer salinus, in salt pans at Ly- 
mington: such the deep-notched paws of the mole- 
cricket ", to the plush-lined soles of the chrysomela 
and curculionide, and the suckers of the fly and the 
gnat. The mollusca, indeed, do not afford any in- 
stances of horny claws: but some possess formidable 
limbs armed, for their especial purposes, with an- 
tennz and papillae, as the sepia and asteriz, of 
which others, as the slugs, &c. are notoriously desti- 
tute. Roots, which are the feet of plants, are in 
some so hard as to pierce the toughest soil, through 
the foundations of walls, and to split rocks by ex- 
pansion of their fissures: others, as most perennials, 
wither, unless the soil around them be soft and light, 
and yielding to their gentle impulse. 
* Land tortoises have thick, round feet: sea tortoises feet flat- 
tened almost into fins: fresh-water tortoises divided, but webbed 
claws. 
" Kirby and Spence, vol. 1. p. 322, &c. 
